Chapter 2, Problem 2.55QP

Interpretation Introduction

Interpretation:

Number of moles of Nickel $\text{(Ni)}$ atom in $\text{5}{\text{.00×10}}^{\text{9}}\text{(9}\text{billion)}$ Ni atoms has to be determined.

Concept introduction:

• A mole is $\text{6}\text{.022 }\times {10}^{23}$ of anything.
• $\text{6}\text{.022 }\times {10}^{23}$ Is known as Avogadro number.
• Atom is the smallest particle of a chemical element.
• The number of moles of a substance can be calculated by dividing the Avogadro number with the atoms of the given substance.

  $\text{Moles}\text{of}\text{substance}\text{=}\frac{\text{Number}\text{of }\text{atoms}}{\text{Avogadro}\text{Number}}$